Many people say to get into a 550 if you are new to progressive. I just ordered a 650 and now for the wait. The 650 might be too much for someone that hasn't had experience on a progressive.
I wouldn't do anything too extreme without consulting your doctor first. A long fasting cycle can have adverse effects if you are not medically sound for this.
I have tried Black Powder it FOR ME was a lot better than NO explode no comparisons. I always get adjusted to the extra caffeine fast but the Black Powder works great.